Q:
I'm working on my site and I have some problems with your css vertical drop down menu.
Why the background images disappear for a while after hovering over them, then
reappear after a while. Can you tell me how to stop this from happening?

A:
You have set the following parameter:

var itemBackColor=["#FFFFFF","#4792E6"];

The second color is the mouseover background color of the css vertical drop down menu.